Update app.py

app.py

@@ -25,6 +25,8 @@ with open(css_file) as f:
     
 HUGGINGFACEHUB_API_TOKEN = os.getenv("HUGGINGFACEHUB_API_TOKEN")
 
+wechat_image= "WeChatCode.jpg"
+
 # Load documents from a directory
 documents = SimpleDirectoryReader('data').load_data()